Duplex fountain-pen.



` G. A. 000111111. DUPLEXy FOUNTAIN PEN.

APPLIOATIONIFILED JUNEZ'I, 1910.

1,035,538- Patented Aug. 13,1912.

G. A. COOPER.

DUPLEX FOUNTAIN PEN.

APPLIUATION FILED 11111227, 1910.

Patented Aug. 13, 1912.

Unire onirica.

GEORGE COOFER, OF OAK PARE, ILLINOIS.

DUPLEX FOUNTAINf-PEN.

Losaass.

` A Specification o! Letters Yntent.

Iatente'd Aug. 13, 1912.

Application tiled June 27, 1910. Serial No. 588,958.

To all whom it may concern Be it known that I, GEORGE A. Coornn, al

citizen of the United States, and a resident .of Oak Park, in the county of Cook and State of Illinois,`have invented certain new and useful Improvements in Duplex Fountain-Pens; andJI do hereby declare that the following is a full., clear, and exact. description thereof, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates to a 'duplex lfountain pen arranged with a lurality of inl: reservoirs for inks of diiierent color or characters andprovided with a plurality ot pen points each adapted to be separately y supplied with ink from its reservoir.

'- ing 4pear from the subjoined he object of therinvention is to provide apen by which to write with inks of dit'- ferent colors or having other distinguishcharacters, ythe pen points being mounted on a single hand piece or barrel, and having means whereby each pen point may be separately used for an ink of one color or character with the same facility as in a single pen.

A further object of the invention is to provide means for cutting oli' the low of ink from each pen point when'in its non-writing position and t'or opening the flow ot ink to each pen point when 'it is in writing position.

A Yfurther object of the invention is to provide means for alternately moving the pen points into their writing and non-writing positions.

(,)ther objects `:of the invention will apdescription, and the invention consists in the matters herein after set forth and more particularly pointed out in` the appended claims. "i

lIn tlilel drawings, Figure 1 is a side elevation of a pen embodying my invention, with;

the cap shown in section. Fig. 2 is a side elevation of the pen, turned ninety degrees from the position shown in Fig. 1. F1.

isa view similar to Fig. 1, with parts broten away and other parts shown in section. Fig- 4 is an enlarged longitudinal section on line 4.-4 of Fig. 5. Fig. 5 is a longitudinal section on theline 5-5 otI Fig. 4. Fig. G is a transverse section on line (S-G ofl Fig. 5. Fig. 7 is a transverse section on the indirect line 7-7 of Fig. 5. Fig. 8 is a .view oi" the pen barrel with the end cap i'cmoved. Fig. t) is a longitudinal section on the line 9-9 of Fig. 8, showing the end cap in dotted lines. Fig. 10 is a transverse section on the line 10--10 of Fig. 11. Fig. l1 is a longitudinal section on the line 11-11 of Fig. 10. Fig. of the barrel partition and the integral feed chamber guide, showing the feed chambers in position thereon. Fig. 13 is a transverse section on the line 13-13 of Fig. 12.' Fig. 1l is a side elevation of the arts shown in Fig. l2, with one of the feed chambers removed. Fig. 15 is a side elevation of a modiied form of the peli. Fig. 16 is a side elevation of the pen shown ninety degrees from the osition shown in the latter ligure, and partiall broken away.

'lhe barrel 18 of the pen is divided by a longitudinal partition 19 into two lon itudii nal ink reservoirs 20, 20 which are adapted to be supplied 12 'is an edge view y in Fig. 15 turned with ink through openings in i the end wall 21 of the barrel closed by the screw-threaded plugs 22. The filling end of the barrel and said plugs are covered by a cap 24 screwtlircaded to the barrel. The partition 19 is laterally offset, as shown at 25, so as to make oneof the reservoirs larger thai the other. If, for instance, the pen bepemployed for red and black ink, it

will usually be desirable that the reservoir l for the red ink be smaller than that for the black ink. The partition may be formed as a separate part and fitted at its side and end in the grooved portions 2Q, 27 of the.

barrel and its end wall. When so made the end wall 21 will have the form of a cap that has a sli fit in the outer end of the barrel, and sai cap may be locked to the barrel by the screw-threaded cap 24 in the manner shown in Fig. 9.

' As herein shown, the partition 19 is extended throu yl1 the end wall 30 at the writing end of tie barrel to constitute a-guide bar 31 which projects from the barrel to support and guide the pen point feed chambers 83, 33 in the outer ends of which the pen points 34, 34 are mounted. In tliclpresent 3 construction both pen points are located at one end of the barrel and are adapted'to be alternately shiftedinto and out of writing position; one pen point and its feed chamber occupying a writing position while the other pen point and its feed chamber occupies a non-writing position. The said feed chambers 33 are contained within and partially supported and guided by the tubular extention 35 of theliarrel which is scrc\vlhreaded to the barrel and is tapered from a point 3o chamber constit-utes end wall 3U of the barrel.

about midway of its ends to its outer end. The outer end of said extension is open. One of thefeed chambers is located on one side of the guide bar 3l and the other on 5 the other side thereof, each occupying the space between the guide bar and the adjacent wall of the extension.

The said feed chambers are slidably connected with the guidebar 31 by means of 0 screws or rivets 37, 37 which extend through longitudinal guide slots 38, 33 in said guide ba'r and into the inner flat walls or sides of tliefeed chambers, which latter fit fiat against said guide bar. One slot 38 of the guide bar 3l is depressed on one side of the bar and the other slot is depressed on the other side of said bar, whereby the eountersunk heads of the rivets or screws on the depressed sides of the guide bar are flush with the faces of the guide bar to avoid interference with the flat faces of the feed chambers which slide thereon. The walls of the feed chambers opposite to the fiatinner walls thereof are tapered to correspond with the taper of the extension 35, so that when each chamber is slid forwardly to project its pen point into its writing position, as shown at the upper side of Fig. 5, the engagement of the tapered surfaces of the extension and a stop to limit the outward movement of the feed chamber.

The rear end walls 40 0f the feed chainbers comprise separately formed plugs which sare fitted in the rear hollow ends of the feed bhambers, and said plugs are provided with central openings 41 into which extend the ends of feed tubes 42 by which ink is conveyed from, the reservoir 2O to the feed chambers. The rear ends of said tubes are screw-threaded into and extend through the i The ink is suplplied tfroin-eacllffecd chamber to its pen point through a feed opening 44 in the front wall 45 of the feedchamber, the inl: iiowing 45 y' beneath the pen point er nip into the space between the same and 'the feed grooved block 46, in a manner familiar infountain penl constructions.

The feed chambers are adapted-to be shifted into writing and non-writing positions bymeans of actuating bars or rods 47, 47 which are screwed or otherwise attached at their forward end to the rear walls or feed chambers and extend backwardly through` passages 48 in the thickened portion of the lwall of the pen barrel, as shown iii Figs. 3, 4, 10 and ll. The said actuating bars are connected at the outer end of the barrel to, or are provided with, manually operable means by which the bars and the ink chambers connected theretoiriay be slid forwardly and backwardly. I "As shown in Figs. l, 2, 3, 10 and 1l, the actuating bars 47 may be provided with gear teeth or racks 50 which are adapted to be engaged by a pinion 51 rotatively mounted in a chamber 52 in the thickened portion of the barrel wall and arranged between said racks. The said pinion 5l, as best shown. in Fig. 10, is iixed to the inner end of a rota-tive shaft 54 that has a step bearing at its inner end in the thickened portion of the its outer end vin a plug 55 which is screwthreaded into the chamber 52. The said shaft 54 is enlarged inside of the plug to barrel wall and has rotative bearing near prevent withdrawal of the and the shaft is rotated through the medium of a disk 57 that is fitted over the outer squared end of the shaft and is attached thereto by a countersunk screw 58 that extends into a screw-threaded axial opening of the shaft, with its headv overlapping said disk. With this construction, rotation of the shaft 54 and its attachedl pinion serves to advance one of the feed chambers and its pen point through the outer end of the barrel extension 35 into writing position, and to simultaneously retract the Yother feed chamber and its pen point to its non-writing position within said extension; these positions being shown in Fig. 5,

In lieu of the rack and pinion actuating mechanism described, may provide the outer ends of the actuating bars 47 with the finger pieces or lugs 60, 6 that extend outwardly through the parallel slots 6l, 61 in the barrel wall, as shown in Figs. l5 and 16, whereby each feed chamber and its pen point may be retractedand advanced without regard to movement of the other chamber. ln this construction both of the pen points may be retracted or brought to their non-writing positions at the saine time.

I may provide means for cutting oif the flow of ink from the interior of the feed chambers 3.3 when said chambers occupy their inner or 'non-writing l positions. ln order to effect this result, I may provide the rearwardly extending pins i (53, G3 that are fixed atthcir forward ends in the forward end walls 45 of the feed chamber and extend rearwardly therefrom, through the feed chambers, a distance beyond the rear end walls of the chambers into the feed tubes 42. The said pins 63 are tapered inwardly and are of such size at their forward or larger ends that when they are moved rearwardly with the feed ichambers and pass into the feed tubes, the vforward ends of said feed tubes are closed i by the larger parts of the tapered pins. The said-tapered pins and ends of the feed tubes constitute, therefore, valves for cutting off the tloxvof ink from the reservoirs to the feed chambers when the latter occupy their l rearmost or non-writing positions. i ln order to prevent ink which may How backinto the feed chambers from the spaces between the pen points and the feed feed tubes 42 to theA pinion and shaft,"Y

mais,`

blocks 45, escaping from the feed chambers between the rear walls thereof and feed tubes 42, when said chambers occup their rearmost positions, I may provide t e said rear walls of the chambers with the tubular y end ofthe extisions .67 which extend a substantial distance inwardly from the rear walls of the chambers and serve as guards to revent passage of ink between said tubes an chamer walls when the writing end of the pen is directed' upwardly. -The outer or writing ari-el may be 'covered by the usual slip cap 65, shown in Fig. 1, to protect the pen points.

While I have described the illustrated ein'- bodiment of my invention with considerable particularity4 as to details, it will be underi stood vthat the invention is not limited to the details shown and that `the invention is capable of considerable structural varia/iol1 1. A duplex fountain pen comprisinga lbarrel provided with two fixed ink reservoirs and two pen points movable relatively thereto into and out of writing position and connected to move alternately in opposite ldirections adapted to separately receive .ink from said ink reservoirs, andmeans positively actuable upon movement of the pen points into and out of writing position for controlling 'the flowv of ink from the reservoirs to said pen points.

' 2. A duplex fountain pen comprising a barrel formed withl two ink reservoirs, two penpoint feed chambers movable relatively to said reservoirs into and out of writing v position, Iandeach .arranged to receive ink from one of said reservoirs, means for actuating said feed chambers, and valves operable upon movement of the feed chambcrs to control the supply of ink thereto.

3. A duplex fountain pen comprising a barrel formed with two ink reservoirs, two pen point feed chambers each arranged to receive ink from one of the reservoirs and movable relatively to the reservoirs into and,

out of writing position, means for actuating said 4feed chambers, and means operable y upon the movement of said chambers into and out of writing position arranged to cut 0,5 the supply of in i to each chamber when ix'iits non-writing posit-ion.

''..LYA duplex fountain Pe comprising 'n barrel'lfiormed with two inkreservoirs, two pen' point feed chambers at one end thereof movable relatively to the reservoirs into and out of writin position, ink controlling valves operate by movement of the feed chambers, said barrel being provided with rearwardly extendin assages, and means connected'to said feed c embers and.,extendl lneans for reciprocating the saine, 6. A duplexfountain penrcgmpmsing a ,voirs, two pen point feed chambers at one i, end thereof movable relatively to the reser- {fvoirs into and out of writing position, 'ymeans for cuttin noff the Vflow of the ink in its non-writingp'osition, and means for actuating said Vfeedchambers to simultaneously move one of the saine and'its pen `'point into writing position and to move the "other chamber; and its pen point into non'- gwriting position.

lbarrel formed with two fixed ink reser- Irelativcly'to the reservoirs into and out of l writing position, means for cutting off the ;low of ink from each feedchamber when fthe latter is in its non-writing position, and rack and pinion mechanism for actuating ysaid feedchambers to simultaneously-move ,one into 'writing position and the other into non-writing position.4

8. A duplex fountain pen comprising a barrel formed with two fixed ink reservoirs, i two peny point feed chambers movable relativel-y to said reservoirs into and out of writing position, means for cutting off the flow of ink from e'ach feed chamber when the latter is in itsn'on-writing position, said barrel being provided with rearwardly extending bars in said passages connected at their forward ends to said feed chambers and provided at their rear ends with racks, and a rotative pinion between and meshing with said racks.

9. A duplex fountain pen comprising'a bari-ely formed withstwo ink reservoirs, two en point feed chambers, each communicating with one of said reservoirs, a guide bar projecting from the barrel on whiclisad chambers are slidably mounted and means 4'for moving said chambers .into and out of writing position.

10. A duplex barrel formed with two pen point feed chambers,

ink reservoirs, two euch communicat- -ing with one of said reservoirs, a slotted Ivbarrel formed with two fixed ink reser-V voirs, two ,pen point feed chambers movable' fountain pen comprising a 'bersl and provided at their ,rear ends with i from each feed" c amber when the latter is 7. A duplex fountain pen comprisingA ai.

passages, reciprocating actuating p guide bar arranged between said chambers with which said chambers have guiding connection and means for moving said chambers into and out of writing position.

11. A duplex fountain pen comprising a barrel formed with two ink reservoirs, two pen point feed chambers, each communicating with one of said, reservoirs, a guide bar projecting from the barrel between said chambers on which said chambers are slid ably mounted,'a hollow extension open at its outer end and fixed to the barrel and sur rounding said chambers and guide bar, and means for moving said chambers into and out of writing position, said extension hav ing means to constitute a stop to limit the outward movement of said chambers.

12. A duplex fountain pen comprising a barrel formed with two ink reservoirs, two pen pointl feed chambers, each communicating with one of said reservoirs, said chambers having flat inner sides and tapered outer sides, a guide bar fixed to the barrel arranged between and engaging the flat sides of the chambers and on which they slide, a tubular extension of the barrel surrounding said chambers and tapered to engage the tapered sides of the chambers to limit their outward movement., and means for moving said chambers into and out.of their writing positions.

13. A duplex fountainpen comprising a barrel formed with two ink reservoirs, two pen point feed chambers movably and guidingly connected with the forward end of said barrel, fixed feed tubes extending forwardly from the reservoirs into the rear ends of the chambers and over which said chambers slide, and means for moving said feed chambers into and out of writing position, with means for cutting off the supply of ink to each chamber when in its nonwriting position. i i

14. A duplex fountain pen comprising a barrel formed with two ink reservoirs, two pen point feed chambers movably and guidingly connected witlithe forward end of said barrel, fixed feed tubes extending forwardly from the reservoirs into the rear ends of the chambers and over which said chambers slide, means carried by the chambers to close said feed tubes when the chambers are in non-writing position, and means for moving said feed chambers into and out of writing position.

15. A duplex fountain pen comprising a barrel formed with two ink reservoirs, two pen point feed chambersmovably and guidingly connected with the forward end of said barrel, fixed Ifeed tubes extending forwardly from the reservoirs into the rear vends of the chambers and over which said chambers slide, tapered pins fixed to the ingly connected with the forward end of said barrel, fixed feed tubes extending forwardly from the reservoirs into the rear ends of the chambersand over which said chambers slide, means carried by the chambers to close said feed tubes when the chambers arein non-writing position, the rear walls of the feed chambers being provided with interior tubular extensions through which the feed tubes slide when the feed chambers are moved into non-writing position, and means for actuating the feed chambers.

17. A duplex fountain pen comprising a barrel provided at its end with two pen point feed chambers, a partition extending longitudinally through the barrel to divide:

the barrel into two ink reservoirs and formed wit-h a longitudinally arranged, lat? l eral offset or depression to enlarge one reservoir and correspondingly reduce the other reservoir, and means affording communication between said reservoirs and'feed chambers.v

18. A duplex fountain p en comprising two pen'point's Imovable into and out of writing position and so`arranged that one is adapted to be moved vinto writing position when the other moves to its nonwriting position, separate means for supplylng ink to the pen points and valve means controlled by the movement of the penpoints into and out of writing position for opening the supply of ink to and cutting it off from the pen points. I

.19. A duplex fountain pen, comprislng a barrel having two independent ink reservolls,

a pen point feed chamber vassociated with.l

each of said reservoirs and slidably mounted in relation thereto for movement into and out of writing position, ink-feeding means between each reservoir and its fee y ber, means for actuating said feed chambers to move them into writing and non-Writingy positions, and means for establishing communication between each of saidfeed chambers and its reservoir when the same is moved to writing position.

In testimony, that I claim the foregoing.

as my invention I affixmy signature in the presence of two witnesses, this 18th day of June, A. D. 1910.

GEORGE A. COOPER.

Witnesses:

W. L. HALL, WILLIAM GOLDBERGER.

cham` 

